A076181 a(n) = (n^2)!/(n!)^(n+1)/(2n-1).

1, 1, 56, 375375, 577185873264, 337143653615801672640, 112387296492020598351382561996800, 30035919199125011172228882156381540400453089375, 8612584407483201348696124216860807740603132996062773468500000000

Offset

1,3

Links

Amiram Eldar, Table of n, a(n) for n = 1..27

Mathematica

a[n_] := (n^2)!/n!^(n+1)/(2*n-1); Array[a, 10] (* Amiram Eldar, May 05 2025 *)

Crossrefs

Cf. A088020.

Sequence in context: A135426 A028670 A278608 * A278893 A375778 A101355

Adjacent sequences: A076178 A076179 A076180 * A076182 A076183 A076184

Keyword

nonn

Author

Benoit Cloitre, Nov 01 2002

Status

approved